CN210506153U - Waste heat recovery and utilization system of PTA refining unit mother liquor - Google Patents
Waste heat recovery and utilization system of PTA refining unit mother liquor Download PDFInfo
- Publication number
- CN210506153U CN210506153U CN201920779761.XU CN201920779761U CN210506153U CN 210506153 U CN210506153 U CN 210506153U CN 201920779761 U CN201920779761 U CN 201920779761U CN 210506153 U CN210506153 U CN 210506153U
- Authority
- CN
- China
- Prior art keywords
- pipe
- communicated
- heat exchanger
- input port
- mother liquor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012452 mother liquor Substances 0.000 title claims abstract description 106
- 239000002918 waste heat Substances 0.000 title claims abstract description 22
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 238000007670 refining Methods 0.000 title claims abstract description 20
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 74
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 239000012528 membrane Substances 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 79
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 69
- 238000005406 washing Methods 0.000 claims description 15
- 239000012065 filter cake Substances 0.000 claims description 14
- 238000005202 decontamination Methods 0.000 claims description 3
- 230000003588 decontaminative effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 239000002253 acid Substances 0.000 abstract description 10
- 238000002425 crystallisation Methods 0.000 abstract description 9
- 230000008025 crystallization Effects 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 abstract description 9
- 239000010865 sewage Substances 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 7
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- 238000005201 scrubbing Methods 0.000 abstract 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 42
- 229910010271 silicon carbide Inorganic materials 0.000 description 11
- 239000000126 substance Substances 0.000 description 10
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000004064 recycling Methods 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000010612 desalination reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007701 flash-distillation Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to a waste heat recovery utilizes system of PTA refining unit mother liquor. It includes scrubbing tower, first heat exchanger, flash drum, coarse filtration ware, buffer tank, third pump, second heat exchanger, ceramic membrane high accuracy filter, and this system passes through flash evaporation technique, lithium bromide refrigeration technique, normal atmospheric temperature crystallization technique etc. can increase recovery rate and the make full use of mother liquor waste heat of PT acid etc. alleviates sewage subsequent processing pressure, reduces the pollution to the environment, produces huge economic benefits.
Description
Technical Field
The utility model relates to a mother liquor waste heat recovery utilizes system of PTA refining unit, more specifically involve utilizing PTA industrial installation in the refrigeration of refining unit mother liquor waste heat to fall the mother liquor to normal atmospheric temperature, as far as possible recovery PT sour valuable material's such as system.
Background
PTA is the short term pure terephthalic acid obtained by PX through oxidation and hydrofining, is the main raw material of polyester chemical fiber, and is one of the main chemical raw materials of national economy. The prior PTA production process in China mainly comprises several processes such as England and BP, and in the process of PTA hydrofining, the extraction of mother solids in the refined mother liquor can not only reduce the cost of raw materials, but also reduce COD in sewage, so that the recycling of the PTA refined mother liquor is always the focus of attention and research of all manufacturers in the world.
Traditionally, the recovery flow of PTA refining mother liquor is as follows: centrifugal separation, washing, flash evaporation, primary filtration, heat exchange, secondary filtration and sewage discharge. In the process, PTA mother liquor is separated by a centrifugal separator, the mother liquor with the pressure of 0.35-0.4MPa and the temperature of 145-150 ℃ is washed and enters a flash evaporation tank, saturated steam with the pressure of 0.2MPa and the temperature of 133 ℃ which is flashed out is sent into a steam drum, the mother liquor is sent into an atmospheric washing tower and is cooled to about 90 ℃, exhaust steam which is flashed out is sprayed and cooled by cooling water, the mother liquor is pumped into a cooler by a pump, the mother liquor with the temperature of about 90 ℃ is cooled to about 50 ℃ by cooling water from the cooling tower, and is filtered by a candle filter, valuable particles which are separated out from the mother liquor are recovered, and the filtered mother liquor is discharged into a waste water tank.
The treatment method of the PTA mother liquor in the prior device mainly has the following problems:
(1) the residual heat of the mother liquor at 133 ℃ is not effectively utilized, and even cooling water is needed to remove the residual heat, so that the energy is wasted.
The temperature of the mother liquor can only be reduced to 50 ℃ for filtering mother liquor, and experiments show that when the temperature of the mother liquor is reduced to about 25 ℃ at normal temperature, a large amount of white substances are separated out from the mother liquor, so that at 50 ℃, a large amount of valuable materials are dissolved in the mother liquor and are discharged without being separated out.
The COD content in the final mother liquor is more than 8000, which adds a lot of cost to the subsequent treatment.
The candle filter has high running cost and high filter element replacement cost.
The atmospheric washing tower has large steam discharge and large environmental protection pressure.
Disclosure of Invention
For solving a series of problems that exist in the current PTA mother liquor processing, the utility model aims to provide a waste heat recovery utilizes system of PTA refining unit mother liquor, this system passes through flash distillation technique, lithium bromide refrigeration technique, normal atmospheric temperature crystallization technique etc. can increase recovery rate and the make full use of mother liquor waste heat of PT acid etc. alleviates sewage follow-up processing pressure, reduces the pollution to the environment, produces huge economic benefits.
In order to achieve the purpose, the utility model adopts the following technology:
a waste heat recycling system of PTA refining unit mother liquor comprises the following steps:
flash evaporation is carried out on the mother liquor of the PTA refining unit by adopting a flash evaporation technology to obtain steam with required parameters;
a mother liquor heat exchanger is adopted, the waste heat of refined mother liquor is utilized to prepare hot water which is a heat source required by a lithium bromide refrigerating unit, and the refined mother liquor after flash evaporation is primarily cooled;
a coarse filter is adopted to carry out primary filtration on the refined mother liquor after primary cooling, and then the refined mother liquor enters a normal pressure buffer tank to be stored, so that a subsequent system is protected, and part of filter cakes are recovered;
the lithium bromide refrigerating unit is adopted to prepare cold source, namely chilled water, by using hot water as a heat source, wherein one part of chilled water is subjected to final cooling on the refined mother liquor which is buffered, stored and pressurized and conveyed through a low-temperature water heat exchanger, the other part of chilled water is used for cooling air at an inlet of an air compressor,
and finally filtering the refined mother liquor subjected to final cooling by using a silicon carbide ceramic membrane high-precision filter, crystallizing at normal temperature, and recovering a filter cake.
A waste heat recovery utilizes system of refined unit mother liquor of PTA, its characterized in that:
the flash system specifically comprises the following steps:
mother liquor of a PTA refining unit enters a high-efficiency flash tank (6) through a washing tower (1), the refined mother liquor is flashed in the flash tank (6), and generated steam enters a steam drum (8) to obtain steam with required parameters.
A waste heat recovery utilizes system of refined unit mother liquor of PTA, its characterized in that:
the mother liquor heat exchange system specifically comprises the following steps:
mother liquor after the flash distillation enters a mother liquor heat exchanger (5) for primary cooling, desalted water enters a lithium bromide refrigerating unit (14) as a heat source after being heated, desalted water after being cooled is conveyed back to the mother liquor heat exchanger (5) for recycling through a circulating pump (18), and desalted water on a pipe network is used as water supplement.
A waste heat recovery utilizes system of refined unit mother liquor of PTA, its characterized in that:
the coarse filtration system specifically comprises the following steps:
the mother liquor which is initially cooled to the temperature below the normal pressure temperature enters a coarse filter (22) to prevent the crystallization sieve of the mother liquor from blocking a pipeline and preventing the circulation from being blocked, and meanwhile, partial valuable substances of PTA and PT acid are recovered. The filtered mother liquor enters a normal pressure buffer tank (25) for short-time storage and buffering.
A waste heat recovery utilizes system of refined unit mother liquor of PTA, its characterized in that:
the chilled water system specifically comprises the following steps:
preparing and obtaining 17 ℃ chilled water by utilizing a lithium bromide refrigerating unit (14), wherein a part of the chilled water enters a low-temperature water cooler (30), and the mother liquor pressurized by a booster pump (27) is finally cooled, and the temperature of the chilled water is raised; the other part of chilled water enters an air heat exchanger to cool the air at the inlet of the air compressor, and the chilled water is heated. Finally, the chilled water is conveyed back to the lithium bromide refrigerating unit (14) through a circulating pump (20) for recycling.
A waste heat recovery utilizes system of refined unit mother liquor of PTA, its characterized in that:
the normal-temperature crystallization system specifically comprises the following steps:
the normal pressure refined mother liquor passes through a low temperature water heat exchanger (30), is cooled to 20-30 ℃ normal temperature (the normal temperature is preferably 25 ℃), then the 20-30 ℃ normal temperature mother liquor enters a silicon carbide high-precision filter (33) to recover a large amount of PT acid and other substances in the mother liquor, and the normal temperature waste water of about 25 ℃ filtered by the silicon carbide high-precision filter (33) enters an original sewage system for subsequent treatment.
A processing and recycling system of PTA refining mother liquor is characterized by comprising a washing tower, a first heat exchanger, a flash tank, a coarse filter, a buffer tank, a third pump, a second heat exchanger and a high-precision filter; the input port of the washing tower is connected with a PTA refined mother liquor conveying pipe, the output port of the washing tower is communicated with the input port of the flash tank through a first pipe, and the first pipe is provided with a first valve; an output port of the flash tank is communicated with a first medium input port of the first heat exchanger through a second pipe, and a steam outlet of the flash tank is communicated with an input port of the steam drum through a third pipe; a first medium output port of the first heat exchanger is communicated with a water inlet at the upper left side of the coarse filter through a sixth pipe, a second medium input port of the first heat exchanger is connected with low-temperature desalted water from a desalted water pipeline through a fourth pipe, and a second medium output port of the first heat exchanger is communicated with a heat source input port of a lithium bromide refrigeration system through an eighth pipe; a water outlet at the lower right side of the coarse filter is communicated with an input port of the buffer tank through a thirteenth pipe, an acetic acid input port at the upper end of the coarse filter is communicated with a first acetic acid storage tank through a first acetic acid pipe, and a first filter cake outlet is formed in the bottom of the coarse filter; the fourteenth pipe of delivery outlet of buffer tank is linked together with the input port of third pump, the delivery outlet of third pump is linked together by the first medium input port of fifteenth pipe with the second heat exchanger, the first medium delivery outlet of second heat exchanger is linked together by the upper left side water inlet of seventeenth pipe with high accuracy filter, the right downside delivery port of high accuracy filter is linked together with decontamination water processing system by eighteenth pipe, the upper end acetic acid input port of high accuracy filter is linked together by second acetic acid pipe and second acetic acid storage tank, the bottom of high accuracy filter is equipped with the export of second filter cake.
Further, the treatment and recovery system of the PTA refining mother liquor further comprises a lithium bromide refrigeration system and a first pump; the heat source input port of the lithium bromide refrigeration system is communicated with the second medium output port of the first heat exchanger through an eighth pipe, the heat source output port of the lithium bromide refrigeration system is communicated with the input port of the first pump through an eleventh pipe, the input outlet of the first pump is communicated with the second medium input port of the first heat exchanger through a ninth pipe, the top inlet of the lithium bromide refrigeration system is connected with normal-temperature desalted water through a tenth pipe, and the bottom outlet of the lithium bromide refrigeration system is communicated with the input port of the air heat exchanger through a seventh pipe.
Furthermore, a second medium input port of the second heat exchanger is communicated with a bottom outlet of the lithium bromide refrigeration system, a second medium output port of the second heat exchanger is communicated with a second pump input port through a sixteenth pipe, and a second pump output port is communicated with a tenth pipe through a twelfth pipe.
Further, the high-precision filter is a silicon nitride film filter.
The utility model has the advantages that: 1. the utility model discloses be used for preparing the refrigerated water with the waste heat that does not utilize in the PTA mother liquor, realized thermal recycle. 2. The utility model discloses a mother liquor normal atmospheric temperature crystallization technique retrieves valuable materials such as PTA, PT sour in the PTA mother liquor, has reduced mother liquor COD, the subsequent membrane processing system load of greatly reduced. 3. The utility model provides a steam row cause environmental pollution's problem to the atmosphere. 4. The utility model provides a mother liquor processing system does not change present PTA operating mode hardly, and not only the small investment, the energy consumption is low, can produce the refrigerated water moreover, and the refrigerated water that produces is used for cooling the air that gets into air compressor, has reduced the power consumption by a wide margin, has also reduced the running cost of PTA device simultaneously. Therefore, the utility model provides a mother liquor treatment method can bring huge economic benefits.
Drawings
Fig. 1 is a schematic structural diagram of the present invention (which is also a process flow diagram of the present invention).
In the figure: 1-a washing tower, 2-a first pipe, 3-a first valve, 4-a second pipe, 5-a mother liquor heat exchanger, 6-a flash tank, 7-a third pipe, 8-a steam drum, 9-a fourth pipe, 10-a fifth pipe, 11-a sixth pipe, 12-a seventh pipe, 13-an eighth pipe, 14-a lithium bromide refrigerating unit, 15-a ninth pipe, 16-a tenth pipe, 17-an eleventh pipe, 18-a circulating pump, 19-a twelfth pipe, 20-a second pump, 21-a first acetic acid storage tank, 22-a coarse filter, 23-a first filter cake outlet, 24-a thirteenth pipe, 25-a buffer tank, 26-a fourteenth pipe, 27-a third pump, 28-a fifteenth pipe, 29-a sixteenth pipe, 30-a low-temperature water cooler, 31-a seventeenth tube, 32-a second filter cake outlet, 33-a silicon carbide ceramic membrane high-precision filter, 34-an eighteenth tube, 35-a second acetic acid tube and 36-a second acetic acid storage tank.
Detailed Description
The following examples of the present invention will be described in detail, but the scope of the present invention is not limited to the following examples.
The embodiments of the present invention will be further described with reference to the accompanying fig. 1: a waste heat recycling system of mother liquor of a PTA refining unit comprises a washing tower 1, a first heat exchanger 5, a flash tank 6, a coarse filter 22, a buffer tank 25, a third pump 27, a second heat exchanger 30 and a high-precision filter 33;
the input port of the washing tower 1 is connected with a PTA refining mother liquor (PTA refining unit mother liquor, namely, the mother liquor from a pressure filter in figure 1) conveying pipe, the output port of the washing tower 1 is communicated with the input port of a flash tank 6 through a first pipe 2, and the first pipe 2 is provided with a first valve 3; an output port of the flash tank 6 is communicated with a first medium input port of the mother liquid heat exchanger 5 through a second pipe 4, and a steam outlet of the flash tank 6 is communicated with an input port of a steam drum 8 through a third pipe 7; a first medium output port of the mother liquid heat exchanger 5 is communicated with a water inlet at the upper left side of the coarse filter 22 through a sixth pipe 11, a second medium input port of the mother liquid heat exchanger 5 is connected with low-temperature desalted water at 70 ℃ from a desalted water pipeline through a fourth pipe 9, and a second medium output port of the mother liquid heat exchanger 5 is communicated with a heat source input port of the lithium bromide refrigerating unit 14 through an eighth pipe 13 (the second medium output port of the mother liquid heat exchanger 5 is also communicated with a fifth pipe 10); a water outlet at the lower right side of the coarse filter 22 is communicated with an input port of a buffer tank 25 through a thirteenth pipe 24, an acetic acid input port at the upper end of the coarse filter 22 is communicated with a first acetic acid storage tank 21 through a first acetic acid pipe, and a first filter cake outlet 23 is arranged at the bottom of the coarse filter 22; an output port of the buffer tank 25, a fourteenth pipe 26 is communicated with an input port of a third pump 27, an output port of the third pump 27 is communicated with a first medium input port of a low-temperature water cooler 30 through a fifteenth pipe 28, a first medium output port of the low-temperature water cooler 30 is communicated with a left upper water inlet of a high-precision filter (namely, a silicon carbide ceramic membrane filter) 33 through a seventeenth pipe 31, a right lower water outlet of the high-precision filter 33 is communicated with a decontamination water treatment system through an eighteenth pipe 34, an upper acetic acid input port of the high-precision filter 33 is communicated with a second acetic acid storage tank 36 through a second acetic acid pipe 35, and a second filter cake outlet 32 is arranged at the bottom of the high-precision filter 33.
Further, the system for treating and recovering the PTA refining mother liquor further comprises a lithium bromide refrigeration system 14 and a circulating pump 18; a heat source input port (110 ℃) of the lithium bromide refrigerating unit 14 is communicated with a second medium output port of the mother liquid heat exchanger 5 through an eighth pipe 13, a heat source output port (70 ℃) of the lithium bromide refrigerating system 14 is communicated with an input port of a first pump 18 through an eleventh pipe 17, an input outlet of a circulating pump 18 is communicated with a second medium input port of the mother liquid heat exchanger 5 through a ninth pipe 15, a top inlet of the lithium bromide refrigerating unit 14 is connected with normal-temperature demineralized water (normal-temperature water) through a tenth pipe 16, and a bottom outlet (17 ℃ of chilled water) of the lithium bromide refrigerating system 14 is respectively communicated with an input port of an air heat exchanger (for cooling air at an inlet of an air compressor) and a second medium input port of the low-temperature water cooler 30 through a seventh pipe 12.
Further, a second medium input port of the low-temperature water cooler 30 is communicated with a bottom outlet of the lithium bromide refrigerating unit 14, a second medium output port of the low-temperature water cooler 30 is communicated with an input port of the second pump 20 through a sixteenth pipe 29, and an output port of the circulating pump 20 is communicated with a tenth pipe 16 through a twelfth pipe 19.
The waste heat of the mother liquor is utilized to prepare chilled water, and the mother liquor is cooled to normal temperature and then crystallized, so that the recovery rate of substances such as PT acid and the like is greatly improved, and huge economic benefits are brought.
The high-precision filter is preferably a ceramic membrane, and a silicon carbide membrane filter in the ceramic membrane is selected, and the precision is 0.03 um. The pressure of the subsequent mother liquor treatment is reduced, and the recovery rate of valuable substances is greatly increased.
A waste heat recycling system of PTA refining mother liquor is divided into a main line and two branch lines.
The main line is a process line of PTA mother liquor, realizes the utilization of the waste heat of the mother liquor and reduces the temperature to normal temperature for crystallization, improves the recovery rate of PT acid, and reduces COD and treatment difficulty.
Mother liquor of a PTA refining unit (namely, in figure 1, mother liquor coming out of a centrifugal separator of a pressure filter) enters a flash tank (high-efficiency flash tank) 6 through a washing tower 1, refined mother liquor with the pressure of 0.35MPa-0.4MPa and the temperature of 140-. The mother liquor cooled to 0.2MPa and 133 ℃ enters a mother liquor heat exchanger 5 and is cooled to about 90 ℃; wherein the working water of the heat exchanger is 70 ℃, the working water is heated to 110 ℃ and then enters the lithium bromide refrigerating unit 14 as a heat source, the working water is cooled to 70 ℃ after passing through the lithium bromide refrigerating unit 14, the working water is pumped back to the mother liquor heat exchanger through the circulating pump 18 for recycling, and the low-temperature desalination water system is used as water supplement. The mother liquor with the temperature of about 90 ℃ enters a coarse filter 22, the mother liquor filtered by the coarse filter 22 enters a buffer tank 25 and is uniformly stirred, then the mother liquor enters a low-temperature water cooler 30 for indirect heat exchange and is reduced to the normal temperature of 20-30 ℃ (the temperature of the mother liquor is reduced to 25-30 ℃ (normal temperature)), the cooled mother liquor is conveyed to a high-precision filter (namely, a silicon carbide membrane filter) 33 through a pressure pump 27, and a large amount of substances such as PT acid and the like in the mother liquor are recovered through the high-precision filter 33. No extra heat loss exists in the whole process, and energy conservation and environmental protection are really realized.
The temperature of the mother liquor is reduced to 90 ℃, the mother liquor has crystallization phenomenon, the mother liquor enters the coarse filter 22 to filter partial PTA and PT acid, the system is not blocked while the filter cake is recovered, and the secondary mother liquor enters the low-temperature water cooler 30 again to be cooled to normal temperature for crystallization. The chilled water of the low-temperature cooler 30 is prepared by the lithium bromide refrigerating unit 14, wherein one part of the chilled water enters the air heat exchanger to cool the air at the inlet of the air compressor, the other part of the chilled water enters the low-temperature cooler 30 to exchange heat with the mother liquid, the chilled water is conveyed back to the lithium bromide refrigerating unit 14 through the circulating pump 20 to be recycled after heat exchange, and the low-temperature desalination water system is used as water supplement. And finally, filtering the normal-temperature mother liquor by a high-precision filter 33, treating sewage by using sewage and sewage, and recovering a filter cake.
The utility model discloses well mother liquor gets into from the upper left side water inlet of coarse filter 22, flows out by the lower right side delivery port of coarse filter 22, and the filter cake is retrieved from the bottom, is equipped with first acetic acid storage tank 21 on it for wash coarse filter, guarantee to solve the jam problem.
The utility model discloses well coarse filter mainly prevents that mother liquor crystallization sieve from blockking up the pipeline, and the circulation is not smooth. Meanwhile, part of PTA and PT acid valuable substances are recovered.
The high-precision filter (i.e. the silicon carbide filter) 33 of the utility model is more suitable for filtering the mother liquor after the temperature is reduced to the normal temperature, wherein the silicon carbide filter in the ceramic membrane is preferably selected for use, so as to improve the recovery rate of substances such as PT acid and the like and bring huge economic benefits.
The utility model discloses the high accuracy filter (i.e. carborundum membrane filter) 33 is equipped with the acetic acid storage tank simultaneously, guarantees to solve the jam problem.
The utility model discloses well mother liquor gets into from the upper left side of high accuracy filter (i.e. carborundum membrane filter) 33, and the right downside is got rid of, decontaminates water treatment system, and the filter cake is retrieved from the bottom.
The utility model discloses well PTA mother liquor branch line one reaches the circulation when being used for preparing heat source water with the waste heat of mother liquor for the working source water (fourth pipe 9, seventh pipe 12, eighth pipe 13) of mother liquor heat exchanger to reach energy-conserving purpose of reducing consumption.
The temperature of the desalted water is raised from 70 ℃ to 110 ℃ and the desalted water is used as a heat source to enter the lithium bromide refrigerating unit 14, the temperature of the desalted water at 110 ℃ is lowered to 70 ℃ as the heat source, and the desalted water at 70 ℃ is conveyed back to the mother liquor heat exchanger through the circulating pump 18 to be recycled.
The utility model discloses well PTA mother liquor branch line two is lithium bromide refrigerating system, and 17 ℃'s refrigerated water is prepared to lithium bromide refrigerating unit 14, and in one of them some refrigerated water got into air heat exchanger, cools off the air of air compressor import, and another part gets into the mother liquor of low-temperature water heat exchanger 30 and about 90 ℃ and carries out the heat transfer, carries back lithium bromide refrigerating unit cyclic utilization through circulating pump 20 after having exchanged heat.
Claims (3)
1. The utility model provides a waste heat recovery utilizes system of PTA refining unit mother liquor which characterized in that: the device comprises a washing tower (1), a first heat exchanger (5), a flash tank (6), a coarse filter (22), a buffer tank (25), a third pump (27), a second heat exchanger (30) and a ceramic membrane high-precision filter (33); an input port of the washing tower (1) is connected with a PTA refined mother liquor conveying pipe, an output port of the washing tower (1) is communicated with an input port of the flash tank (6) through a first pipe (2), and the first pipe (2) is provided with a first valve (3); an output port of the flash tank (6) is communicated with a first medium input port of the first heat exchanger (5) through a second pipe (4), and a steam outlet of the flash tank (6) is communicated with an input port of a steam drum (8) through a third pipe (7); a first medium output port of the first heat exchanger (5) is communicated with a water inlet at the upper left side of the coarse filter (22) through a sixth pipe (11), a second medium input port of the first heat exchanger (5) is connected with low-temperature desalted water from a desalted water pipeline through a fourth pipe (9), and a second medium output port of the first heat exchanger (5) is communicated with a heat source input port of a lithium bromide refrigeration system (14) through an eighth pipe (13); a water outlet at the lower right side of the coarse filter (22) is communicated with an input port of a buffer tank (25) through a thirteenth pipe (24), an acetic acid input port at the upper end of the coarse filter (22) is communicated with a first acetic acid storage tank (21) through a first acetic acid pipe, and a first filter cake outlet (23) is arranged at the bottom of the coarse filter (22); an output port of the buffer tank (25), a fourteenth pipe (26) is communicated with an input port of a third pump (27), an output port of the third pump (27) is communicated with a first medium input port of a second heat exchanger (30) through a fifteenth pipe (28), a first medium output port of the second heat exchanger (30) is communicated with a left upper side water inlet of a high-precision filter (33) through a seventeenth pipe (31), a right lower side water outlet of the ceramic membrane high-precision filter (33) is communicated with a decontamination water treatment system through an eighteenth pipe (34), an upper end acetic acid input port of the ceramic membrane high-precision filter (33) is communicated with a second acetic acid storage tank (36) through a second acetic acid pipe (35), and a second filter cake outlet (32) is arranged at the bottom of the ceramic membrane high-precision filter (33).
2. The system of claim 1, wherein the system comprises: the system for treating and recovering the PTA refining mother liquor further comprises a lithium bromide refrigeration system (14) and a first pump (18); a heat source input port of the lithium bromide refrigeration system (14) is communicated with a second medium output port of the first heat exchanger (5) through an eighth pipe (13), a heat source output port of the lithium bromide refrigeration system (14) is communicated with an input port of a first pump (18) through an eleventh pipe (17), an input and output port of the first pump (18) is communicated with a second medium input port of the first heat exchanger (5) through a ninth pipe (15), a top inlet of the lithium bromide refrigeration system (14) is connected with normal-temperature demineralized water through a tenth pipe (16), and a bottom outlet of the lithium bromide refrigeration system (14) is communicated with an input port of the air heat exchanger through a seventh pipe (12).
3. The system of claim 1, wherein the system comprises: and a second medium input port of the second heat exchanger (30) is communicated with a bottom outlet of the lithium bromide refrigeration system (14), a second medium output port of the second heat exchanger (30) is communicated with an input port of a second pump (20) through a sixteenth pipe (29), and an output port of the second pump (20) is communicated with a tenth pipe (16) through a twelfth pipe (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920779761.XU CN210506153U (en) | 2019-05-27 | 2019-05-27 | Waste heat recovery and utilization system of PTA refining unit mother liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920779761.XU CN210506153U (en) | 2019-05-27 | 2019-05-27 | Waste heat recovery and utilization system of PTA refining unit mother liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210506153U true CN210506153U (en) | 2020-05-12 |
Family
ID=70576773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920779761.XU Expired - Fee Related CN210506153U (en) | 2019-05-27 | 2019-05-27 | Waste heat recovery and utilization system of PTA refining unit mother liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210506153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113087081A (en) * | 2021-04-14 | 2021-07-09 | 南京依柯卡特排放技术股份有限公司 | PTA refining mother liquor recovery method based on ceramic membrane technology |
-
2019
- 2019-05-27 CN CN201920779761.XU patent/CN210506153U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113087081A (en) * | 2021-04-14 | 2021-07-09 | 南京依柯卡特排放技术股份有限公司 | PTA refining mother liquor recovery method based on ceramic membrane technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101797455B (en) | Liquid environment protection energy-saving low-temperature filter and process thereof | |
| CN201735251U (en) | Liquid environment-protection energy-saving low-temperature filter | |
| CN215444173U (en) | Supercritical carbon dioxide cycle power generation-brine lithium extraction coupling system | |
| CN210506153U (en) | Waste heat recovery and utilization system of PTA refining unit mother liquor | |
| CN101982222A (en) | Device for continuously concentrating gelatin by membrane technology | |
| CN103525887A (en) | Energy-saving environment-friendly crystalline dextrose production method | |
| CN117658365B (en) | Method for stabilizing washing water quality in heavy alkali filtering process in sodium carbonate production | |
| CN113248068A (en) | Resourceful treatment method and system for PTA oxidation tail gas washing tower discharge liquid | |
| CN111544914A (en) | Coal gasification low pressure black water flash distillation heat recovery system | |
| CN216910117U (en) | Maltodextrin apparatus for producing | |
| CN212610438U (en) | Tar distillation heat transfer device | |
| CN202876637U (en) | Double-tower ammonia washing system for membrane separation treatment | |
| CN102839056A (en) | Stepped recovery and purification method and device of biodiesel methanol | |
| CN210544341U (en) | Chloroethylene gas recovery and purification device | |
| CN209307144U (en) | A kind of circular water treating system | |
| CN106753631A (en) | The process of reinforcing desorption type methane purification and recovery carbon dioxide | |
| CN103395914B (en) | Recycling method of glutamic acid crystalloblastic mother liquor | |
| CN112811703A (en) | Zero discharge system is handled to coal gasification buck | |
| CN208108543U (en) | A kind of regenerated heat source tower heat pump system of normal pressure multiple-effect | |
| CN102899369B (en) | Saccharification and sand removal process for producing ethanol through fermentation by using potato as raw material | |
| CN110723767A (en) | Low-temperature evaporation treatment and recovery method and device for iron-containing waste hydrochloric acid in steel plant | |
| CN105016535B (en) | The method and its device of a kind of processing of distilling apparatus top sewage and reuse | |
| CN211084880U (en) | Steam condensate water recycling system | |
| CN108609790B (en) | A kind of water circulation system of Sodium Hyaluronate clean manufacturing | |
| CN210340788U (en) | System for improving quality of intermediate product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201221 Address after: No. 43006, 3rd floor, hongzhishan District, Hubei Province Patentee after: Wuhan Tianlang Environmental Protection Technology Co.,Ltd. Address before: 430072 room 603, office building 06, creative world industrial park, 16 yezhihu West Road, Hongshan District, Wuhan City, Hubei Province Patentee before: Shao Jihui |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |